Automatic shift problems

:banghead: We recently aquired a 1990 Probe LX with automatic, all digital, electric windows, all that fancy stuff. But it has a problem shifting gears. 1st to 2nd ok, 2nd to 3rdnot happening. All the minor things have been done to fix or adjust linkage and such. This is a 4eat tranny, front wheel drive. Anyone know what could be wrong?